Walter h



w. H. WAKEFIELD REWINDING DEVICE FOR LOOM LET-OFFS Filed July 27, 1925rPatented Dec. 22, 1925.

Umirso STATES WALTER H. WAKEFIELD, OF WORCESTER,

1,566,7osj

PATENTf-orFFici-z MASSACHUSETTS, ASSIGiv-on To cRoMPToN a xNowLEs LoonWORKS, or' WORCESTER. MassaoHusn'rrs, AcoaroaA'rioN or MASSACHUSETTS. j

nEwiNDiNe nnvicn non Locri tar-corre. f. v-

Appiica'ion fueafzruiy `27', 1925. serial No`."43,5e9.-

To all whom', t may concern.'

Be it known that LVALTER H. WAKE- FIELD,` a citizen ofthe United States,residing at VVoroester. in the county of Worcester and State ofMassachusetts,v have invented a new and useful Rewinding `Device forLoom Let-Offs, of which the followingvis a specification. f f

This invention relates to'improvementsin loom let-oflsand moreparticularly to means for rewinding the warp for the puropose of lettingback the fabricy after ar' pick out. i' Y It occasionally happens that afaulty pick of filling will be woven into the cloth without beingnoticed immediately by the weaver but where perfect cloth is being woventhese mispicks must vbe taken out by reversing the weaving operations topick out all picks laid after the mispick occurred. 1t is 'desirablethat the original tension on the warp be restored after the pick out andit is the general object of my invention to provide mechanism whichwill' move the warpback 'under the same tension that it was under beforeVthe pick out occurred. f

It is a further object of my invention to provide such mechanism withanadjustment readily accessible from 'the 'front of the loom, theadjustment operating on the tension whether the same is acting in itsnormal capacity orto reverse the warp.

With these and other 'objects which will appear as the 'descriptionproceeds, my invention resides in the combination and arrangementv ofparts hereinafter described and set forth in the claims. p f In theaccompanying drawings wherein have shown two forms of Ymy inventionasapplied to the' friction drum ofk a loonivopera-ting in conjunction witha'creel,A

Fig. 1 is a side elevation ofthe loom having the preferred form ofinvention apf plied thereto, y c f L. Fig. 2 is an enlarged frontelevation looking in the direction OfarrOw '2, Figl, ,rf Fig. 3 is avertical section online 3-3of Fig. 2 on an enlarged scale, Fig. 4 is aview similar to Fig. 2 but showing a modified form of my invention, and`Y Fig. 5 is an enlarged vertical section on l line .5#5 of Fig. 4.

My .invention is .more particularly applicable to looms 'for weaving"cluclnsuch looms havingthe warpgsupply derived. either from a warp beamcarried on the loom or froma Creel disposed to'the rear of the loom.Although j my invention is applicable to either source of warp delivery,I havefshown `the saine herein as associated with'a drum suchv as isused with a Creel. `Referring` to Figs."y

1,4 2, and 3 itywill be seen'that Ihave provided a loom frame 10 aty therear of which is a friction 'drum or warp delivery means 11 pivotallymounted thereon as at 12. 'Secured rigidly to the drum 11 is a bevelgear 13 .which meshes with a bevel pinion 14 carried at the rear end ofa shaftal loosely mounted in bearings 16 secured to the loom frame.

The forward end ofl Athe shaft 15 is vreduced as at 17 to delineashoulder 18, said reducedportion having keyed thereto a fric'- tiondisk19 provided'with afriction suri face 20,'such asleather.V The disk19 rotates with the shaft 15 and is held against motionv along the shaftto the right as shown in Fig. 3 by" engagement -withthe Shoulder 18.Adapted to coact with the disk 19 is a gear 21 having al friction,face-22 whichl is' normally pressed againstthe leather surfacey shafthas securedftheretoa hand wheel 30 vthe hub 31 ofwhich is provided 'withva pair of. spaced ears 32 between which is normally located theiinger-33 of a weighted lever 341 Saidlever 34: is pivote-d as at 35 tothe bearing .blockv 29 so as to beheld against motion transverse' of thestub shaft'28. l

Under normal' conditions the weighted levert'is in the full lineposition shown in Fig. 1 with the'locking finger 33p between the ears32. so that pinion 27 iS held against rotation. Gear 21 meshing with thepinion 27 Ais therefore heldagainst rotation to resist frictionally therotation of disk 19. It is to be understood that ythe latter moves withthe drum all, Athe retardation 0f the rotation Qt the drinnbeing,effectedthrough the frictional contactv between the facesZO and22. Adjustment of the friction may be accom.- iilielieel bimeeee .et,este 24. emi eating @e eine .23: r the time, of per om the weightedlever 3-1 is thrown to the dotted Y line position shown ,in Fig. l, thusunlocking Yio the pinion 27 and gear 2lto permit rotationof the handwheel 30 inthe reverse direction to cause rotation of the friction face.22. disk 19 will therefore be rotated in reverse direntionto .cansethedrum/ll to move. backiiiardly thi'oiieh'tlief beviel' eser end-Pinion.13 lil, respectively. ltwill be noted that liesleeter tore@ een .bebroiie'htyto bear Y'linee the reversing. ofthe .drum than their.

Y which can be transmittedby the. friction. and

f sible to the Weaver.

, other.V being seci11'ed'to some `part'which th tithe frictionVYduri-ng the pick otitis.l the eV as that which prevails during normalya vingllhen thejcloth has been moved 32 'additional movement of thehand. Wheel .Witheet platine undue Strain 1113011 the 111 Else 4L. and5. differs from the preferred sttutedifor the fece. friction .shown inthe tion lface el which contacts with the leather portion 42.AOt.e.,tieni-ble vfriction `tenerme.. As shown'in Fig. 4l s ai'fd vhandis 'anchored at 0.11 end to e iXedlstudetoarriedby a plate ifandhas theother fend connected'by means of ascrexv andwing nut l'fto alug-,lifalso carried bythe plate 45.

Said: plate 45 is riveted ori otherwise secured'to a; gear; meshing withthe pinion 27 as ingt'he preferredform' ofthe invention. The .operationof the modified` form i of the invention is subStential-lythe same asthat for'thepreferred form,` adjustment lofy rthe frictionV 'beingobtained through' the screw and: wing nut ,4:6 which is vlocated at ythefront of the loom wherezit is readily acces- Erom the foregoing. itVwill `loe, seen that I have prloi'iided aloom let-back'soiarrang'edthat'the same may be reversed at` the timeof pick out to' causek theWarp to be moved (hack-i wardly by means, ofthe same friction whichnormally resistsits 'forward` movement, the mea-ns fora'ccomplishingthis result including .twol lf-rict'ion vmembers one ofwhich is normally stationary and` adjustable andl the movesfwiththe warpdelivery. v

lHaving thus 'described my invention it will be apparent that. changesand-moditica tions may be "made therein bythose skilled said lugs intooperative :positionl in the art Withoiit departing from the. spirit andscope of the invention5'and l do not wish to be limited to the detailsherein vdisclosed bei. what I-eleim 1S= l. ln. alet-,off mechanism foralonm having a warp delivery means,V apair of'c .oacting frictionelements to resist movement of the -warpdeliyery lineans, one of saidelements.

being operatively connected vto and moving withfithej delivery means, valock to hold the other element normally stationary but movable torelease saidv second element7V and means to/ reverse the second 'namedelement' when the lock is moved to'releasing position to canse a'reversemovement ofthe Warp deliverymeans, the oontacting'V portions of thefriction 4elements s. being intermediate the Y n Warp delivery means andthe means toreverse the second element. Y

2. ln a let-.o-ffmechanism for a loom-having a warp delivery means atthe rear thereof, a normally moving friction element nearv vtht-frontofthe loom, connections between the'warp delivery means andvsaidelei'nent to. cause said means and element to move tcgether,l asecond normally stationary frictonclement to 4coact with ythe firstelement to retard `movement of ythe warp delivery means,V a lock to holdthe second element normally stationary-but movable 'to release said.second element, and means to move the secondV named element whenunlocked to callsea reverse movement ofthe iirst named element andthewarp delivery` means. 4 {lr-ln(aeletj-oilifmechanisml fora loom have icoing a Warp, .delivery means near therear of the loom, a friction elementladjacent-'the fronet'of-thef loom',connections between said elemen-tandthe warp delivery means to cause said element and means to movetogethenia second; friction element coacting with the'tirStl namedelement to retard movement ofnthe warp, delivery meansv a lock to hold.thel seco-ndjfriction 'element normally stationary but movablel toreleasesaidsecond element, and means to move said second.. element to'impart' motion to the warp delivery means through thel irst. namedelellf-le.,I1-t;

4.-.' In aletfoff mechanism fora loom having alwarp.; delivery means, afriction e1@- ment adjacent thefront of the loom, 'oonnections betvveensa'id element andthe Warp delivery..- meansto canse said: elementand Ineansto move together, a second'- friction element coacting withthe first ,named ele.-

ment to; retard" mo'vementy of the Warp"y delivery means,. alock to holdthe second (friction element. normally 'stationary but movable torelease .said-.secondelement, means tofmove. said secondieleme'nt toimpart motion to thel warpdeliverymeans through the first named element,and means acces+ sibletfrom thefrontl ofthe loom to vary the frictionbetween said elements, said adjustment. being .maintained When the.second the second fricti-on element normally stationary but movable torelease the second named element, the latter being movable when releasedto impart'reverse motion to the shaft and warp delivery means throughthe first named element.

6. In a let-off mechanism for a loom having a Warp deliveryV means, ashaft having operative contact with the warpv delivery means extendingtoward the lfront of the loom, a friction element rigid with respect tothe shaft and movable with the warp delivery means, a second frictionelement loose with respect to the shaft, a lock to hold the secondfriction element normally stationary but movable to release the secondnamed ele'- inent, the latter being movable when released to impartreverse motion to the shaft and delivery means through the first namedelement, and means readily accessible from the front of the loom toadjust the friction between said elements.

7. In a let-off mechanism for a loom having a frame and warp deliverymeans supported thereby, a shaft extending from the warp delivery meansto the front of the loom, geared connections between the shaft and themeans, a friction element rigid with respect to the shaft, a secondfriction element loose with respect to the shaft and coacting with thefirst named ele-ment, and a locking lever pivoted to the frame andnormally holding the second named element against movement but movableto release y said second named ele'ment,'the latter' when released beingmovable to reverse the directio-n of the shaft, gearing and .means tthrough the first named friction element.

8. In a let-off mechanism for a loom having a framev and a warp deliverymeans supported thereby, a. shaft extending from vthe warp deliverymeansto) the front of the 4 loom, geared connections between the shaft andthe means, a friction element rigid with respect to the shaft, 'a'secondfriction element coacting with the first named element, a locking leverpivoted to the frame and normally holding the second named elementagainst movement but movable to release said second named element, thelatter when released beingmovable to reverse the direction of the shaft,gearing and means through the first named "friction element, and readilyadjustable means accessible from the front of the loom to varythefriction between the elements. i

9. In a let-off mechanism for a loom having' a 'frame and a Warpdelivery means supported thereby, a shaft extending from the meanstoward the front of the loom, geared connections between the shaft andthe means, a friction element rigid with respect to the shaft, a secondfriction element coacting with the `first named element and loose with i.respect to the shaft, a gear movable with impart reverse motion to thefirst named element, shaft and Warp delivery means through the firstnamed element.

In testimony whereof I have hereunto affixed my signature.

WALTER' II. VVAKEFIELD.

